flwoer structure

• flower structure

  A) anther

  B) filament

  C) stamen

  D) stigma

  E) style

  F) ovary

  G) carpel

  H) petal

  I) sepal

  J) ovule

  
• vegetative parts of a flower (sterile)

  • sepal
  • petal
• reproductive parts of a flower (fertile)

  • stamen
  • carpel
• • STAMEN The pollen-producing part of a flower;
  • CARPEL The ovule-bearing reproductive unit of a flower.
• CALYX= Collective term for sepals
• CALYX= Collective term for sepals
• COROLLA= Collective term for petals
• Complete flower - if all four floral whorls (sepal, petal, stamen and pistil) are present in the same flower structure

  
  

  Incomplete flower - lacks any one or more of these parts.
• PERFECT FLOWER -present of stamens & pistils (bisexual, hermaphrodite)
• IMPERFECT FLOWER - staminate or pistillate (unisexual)
• IMPERFECT FLOWER - staminate or pistillate (unisexual)
• Monoecious plant - is one with only unisexual

  flowers, both staminate and pistillate on the same

  individual plant.
• Dioecious plant -

  is one with unisexual

  flowers, but with

  staminate and

  pistillate on separate

  individual plants
• Connation: fusion of floral parts from the same whorl
• Flower with superior ovary - when the base of

  the ovary is located above the place, where the

  sepals, petals, and stamens are attached. This

  point of attachment is referred to as the receptacle

  or hypanthium, the fused bases of the three floral

  parts; Flower hypogynous.
• Flower with inferior ovary - has an ovary below

  where the sepals, petals, and stamens are

  attached; Flower epigynous.
• Adnation: fusion of floral parts from different whorls
• Inflorescence - The arrangement of flower in an axis.
• The transfer of pollen grains from anther to stigma is known as POLLINATION.
• FERTILIZATION Fusion of male and female gametes. After fertilization, flowering plants produce seeds inside fruits.
• ovary develops into fruit at maturity
• ovules develop into seed
• hypogynous - ovary is superior
• epigynous - ovary is inferior
• perigynous - ovary is semi-inferior
• androecium - house of males
• gynoecium - house of females
• hypanthium - adnation of calyx, corolla, and stamens
• gynoecium

  A) monocarpellary

  B) polycarpellary

  C) apocarpous

  D) syncarpous

  
• placentation - the arrangement of ovules within ovary walls
• placentation

  A) marginal

  B) parietal

  C) axile

  D) free central

  E) superficial

  F) basal

  
• Flowers actinomorphic - Flowers radially symmetrical
• Flowers zygomorphic - Flowers bilaterally symmetrical
• double fertilization

  A) egg

  B) two nuclei

  C) endosperm

  D) endosperm

  
• This process, in which two separate cell fusions occur, is called double

  fertilization.
• Cotyledon - either one or two

  Radicle - embryonic root

  Hypocotyl - connects the radicle to the cotyledon

  The shoot apex, or terminal bud, located above the point of attachment

  of the cotyledon(s) is the plumule.
• dormancy (a temporary state of arrested physiological activity).